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File:1203 Concept of NucleusN.jpg|thumb|right|350px|Within science nucleus may refer to: atomic nucleus|atomic nuclei, cell nucleus|cell nuclei or Nucleus (neuroanatomy)|nuclei of the brain or spinal cord. '''Nucleus''' (pl: ''nuclei'') is a Latin word for the seed inside a fruit. It may refer to: *Atomic nucleus, the very dense central region of an atom *Cell nucleus, a central organelle of a eukaryotic cell, containing most of the cell's DNA *Nucleus (neuroanatomy), a cluster of cell bodies of neurons in the central nervous system *Nucleus (syllable), the central part of a syllable in linguistics *Comet nucleus, the solid, central part of a comet *Condensation nucleus, the seed of a raindrop **Ice nucleus, the seed of a snowflake *Nucleus (algebra), the elements of a ring that associate with all others
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